28 THE NAUTILUS. 
Criticism of meanings in zoological nomenclature has long 
been given up as hopeless, since zoological Latin is not classical 
but the colloquial patois of the 18th century. 
The form Turritidae was the first used and therefore, other 
things being equal, is entitled to the preference. In the whole 
of zoological literature, except Adams’ Appendix, until lately 
the Turrii combination does not occur in a single instance, 
while Scudder gives ten instances of the Turriti form. Even in 
English we say a castle is turrited and not Turried. Turritus 
means high, lofty or turrited. Turritidae is the family of the 
same. Finis! 
LAND SHELLS FROM BEAVER COUNTY, PENNSYLVANIA. 
BY E. G. VANATTA. 
Mr. James B. Clark collected several packages of leaf mould 
on the Clydesdale Brick and Stone Company’s farm in Beaver 
County near Ellwood City, about 39 miles north of Pittsburgh, 
Pa., from which I picked specimens of the species listed below. 
The examination of the animal of Auconulus sterkii Dall, which 
is very abundant at this place, revealed a horn upon the tail 
and tricuspid lateral teeth, proving that this species is a Guppya. 
The microscopic sculpture of the shell is also like that genus. 
Polygyra tridentata juxtidens Pils. Polita hammoms (Strom. ). 
Polygyra profunda (Say). Polita indentata (Say). 
Polygyra denotata (Fer. ). Paravitrea multidentata(Binn. ). 
Polygyra pennsylvanica (Gy. ). Euconulus chersinus (Say). 
Polygyra thyroidus (Say). Guppya sterkui (Dall). 
Polygyra albolabris (Say). Zonitoides arborea (Say). 
Polygyra zaleta (Binn. ). Zonitoides minuscula (Binn. ). 
Polygyra hirsuta (Say). Striatura milium (Morse). 
Gastrocopta contracta (Say). Pyramidula alternata (Say). 
Columella edentula (Drap. ). Gonyodiscus perspectiva (Say). 
Cochlicopa lubrica (Mill). Punctum pygmexum (Drap.). 
Haplotrema concava (Say). Succinea retusa Lea. 
Omphalina cuprea Raf. Carychium exile Lea. 
Mesomphix tnornata (Say). 
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